Its kind of fucked either way. They're too short but a lot happens because each book is broken into thirds that are separated by huge time gaps, and inside those thirds there are also time gaps. A movie, even a long one, would be incredibly disjointed and the pacing would feel bizarre.
I imagine it's probably why nobody has made it a series or movie before even though it's such a beloved sci Fi series. You'd have to take a lot of creative liberties with it, which is for better or worse, what they're doing.
Nice! I feel like I'd read somewhere that they added it but I haven't used Thunder in weeks now, connect has become my #1 daily driver and sometimes I check on eternity when it updates. I should try to give thunder some love though,not was my #1 for a while when connect was still a little jank/less polished.